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EP0261828A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Microwave network analyser

Assignee: Flann Microwave Instruments Ltd
•
Filing: 1987-09-07
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Granted: —
•
Expires: 2007-09-07
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Abstract

Abstract The analyser includes a source (1) providing a microwave signal of known frequency; a detector (9) operative to provide a signal indicative of the magnitude of a microwave signal supplied thereto; a first directional coupler (3) by way of which the signal from the source (1) can be supplied to a network (5) under analysis and to the detector (9); a second directional coupler (4) by way of which a signal from the network (5) under analysis and deriving from the signal supplied thereto from the source (1) can be supplied to the detector (9); switch means (6, 7) selectively operable to supply either the signal from the first coupler (3) and/or the signal from the second coupler (4) to the detector (9), the switch means (6,7) providing at least two mutually different length paths for each of the signals supplied thereto; a third directional coupler (8) by way of which the output of the switch means (6,7) is coupled to the detector (9); and calculation means (11) responsive to signals from the detector (9) to calculate the vector ratio of the signals supplied to and from the network (5) under analysis.

Inventors

  • 👤 Khalil Khoury

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 15:21
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R27/02; G01R27/04; G01R27/06

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 197 words
A microwave network analyser, characterised by a source (1) providing a microwave signal of known frequency; a detector (9) operative to provide a signal indicative of the magnitude of a microwave signal supplied thereto; a first directional coupler (3) by way of which the signal from the source (1) can be supplied to a network (5) under analysis and to the detector (9); a second directional coupler (4) by way of which a signal from the network (5) under analysis and deriving from the signal supplied thereto from the source (1) can be supplied to the detector (9); switch means (6, 7) selectively operable to supply either the signal from the first coupler (3) and/or the signal from the second coupler (4) to the detector (9), the switch means (6, 7) providing at least two mutually different length paths for each of the signals supplied thereto; a third directional coupler (8) by way of which the output of the switch means (6, 7) is coupled to the detector (9); and calculation means (11) responsive to signals from the detector (9) to calculate the vector ratio of the signals supplied to and from the network (5) under analysis.
Claim 2
Dependent Claim 197 words
A microwave network analyser, characterised by a source (1) providing a microwave signal of known frequency; a detector (9) operative to provide a signal indicative of the magnitude of a microwave signal supplied thereto; a first directional coupler (3) by way of which the signal from the source (1) can be supplied to a network (5) under analysis and to the detector (9); a second directional coupler (4) by way of which a signal from the network (5) under analysis and deriving from the signal supplied thereto from the source (1) can be supplied to the detector (9); switch means (6, 7) selectively operable to supply either the signal from the first coupler (3) and/or the signal from the second coupler (4) to the detector (9), the switch means (6, 7) providing at least two mutually different length paths for each of the signals supplied thereto; a third directional coupler (8) by way of which the output of the switch means (6, 7) is coupled to the detector (9); and calculation means (11) responsive to signals from the detector (9) to calculate the vector ratio of the signals supplied to and from the network (5) under analysis.
Claim 3
Dependent Claim 32 words
An analyser as claimed in Claim 1, characterised in that the signal from th e source (1) is supplied to the network (5) under analysis by way of the second coupler (4).
Claim 4
Dependent Claim 39 words
An analyser as claimed in Claim 1 or Claim 2, characterised in that the switch means comprises first and second switches (6 and 7) each providing an isolation condition and at least two mutually-different-length paths in the pass condition.
Claim 5
Dependent Claim 35 words
An analyser as claimed in any preceding claim, characterised by a delay means (10) in the path for the signal from the source (1) between the switch means (6, 7) and the third coupler (8).
Claim 6
Dependent Claim 25 words
An analyser as claimed in any preceding claim, characterised in that the calculation means is a computer (11) which also controls operation of the analyser.
Claim 7
Dependent Claim 41 words
An analyser as claimed in any preceding claim, characterised by a store storing calibration data obtained by measurement of a known microwave standard with the analyser, the calibration data being used to correct measurements obtained during subsequent use of the analyser.

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